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Sewage treatment plant, major discharger, Norway, Maine. NPDES permit ME0100455, in force until Aug 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| pH | minimum | ≥ 6 SU | Jun |
| pH | maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| pH | maximum | ≤ 9 SU | Jun |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jun |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | Jun |
| Solids, total suspended | monthly average | ≤ 244 lb/d | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 189 lb/d | Jun |
| Solids, total suspended | daily maximum | ≤ 407 lb/d | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 315 lb/d | Jun |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jun |
| Solids, total suspended | weekly average | ≤ 366 lb/d | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 283 lb/d | Jun |
| Solids, settleable | daily maximum | ≤ .3 mL/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, settleable | daily maximum | ≤ .3 mL/L | Jun |
| E. coli, thermotol, MF, MTEC | monthly average | ≤ 100 #/100mL | Apr, May, Jul, Aug, Sep, Oct |
| E. coli, thermotol, MF, MTEC | monthly geometric mean | ≤ 100 #/100mL | Jun |
| E. coli, thermotol, MF, MTEC | daily maximum | ≤ 236 #/100mL | Apr, May, Jul, Aug, Sep, Oct |
| E. coli, thermotol, MF, MTEC | daily maximum | ≤ 236 #/100mL | Jun |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .975 MGD | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .755 MGD | Jun |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | Jun |
| Chlorine, total residual | daily maximum | ≤ .3 mg/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Chlorine, total residual | daily maximum | ≤ .3 mg/L | Jun |
| Analytical Chemistry | value | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Mercury, total [as Hg] | monthly average | ≤ 14.7 ng/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Mercury, total [as Hg] | monthly average | ≤ 14.7 ng/L | Jun |
| Mercury, total [as Hg] | daily maximum | ≤ 22.1 ng/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Mercury, total [as Hg] | daily maximum | ≤ 22.1 ng/L | Jun |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jun |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 45 mg/L | Jun |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 203 lb/d | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 157 lb/d | Jun |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 366 lb/d | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 283 lb/d | Jun |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jun |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 252 lb/d | Jun |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | Jun |
| Carbonaceous oxygen demand, % removal | monthly average minimum | ≥ 85 % | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Carbonaceous oxygen demand, % removal | monthly average minimum | ≥ 85 % | Jun |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | value | report only (%) | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| Noel Statre 10Day Chronic Salvel. Salmonid | value | report only (%) | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| NOAEL Static 48Hr Acute Ceriodaphnia dubia | value | report only (%) | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
| NOAEL Static 48Hr Acute Salvel. Salmonid | value | report only (%) | Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec |
Cited limits by parameter: Maine's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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